Whether you are a commercial grower or a do-it-yourself horticulturalist, the modularized ZELION HL family LED is suitable for your application. Efficient and dependable LED light fixture for the horticulture industry Features: Independent red and blue On/Off switches OSLON LEDs L70 life rating of > 100,000 hours State-of-the-art optical design and materials for optimum PAR (Photosynthetically Active Radiation) 36" x 24" working areas Passive cooling, silent Energy saving LEDs compared to traditional light sources Water resistant, 3 year limited warranty